(guile.info.gz) User Information
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38.4 User Information
=====================
The facilities in this section provide an interface to the user and
group database. They should be used with care since they are not
reentrant.
The following functions accept an object representing user
information and return a selected component:
`passwd:name'
The name of the userid.
`passwd:passwd'
The encrypted passwd.
`passwd:uid'
The user id number.
`passwd:gid'
The group id number.
`passwd:gecos'
The full name.
`passwd:dir'
The home directory.
`passwd:shell'
The login shell.
-- Scheme Procedure: getpwuid uid
Look up an integer userid in the user database.
-- Scheme Procedure: getpwnam name
Look up a user name string in the user database.
-- Scheme Procedure: setpwent
Initializes a stream used by `getpwent' to read from the user
database. The next use of `getpwent' will return the first entry.
The return value is unspecified.
-- Scheme Procedure: getpwent
Return the next entry in the user database, using the stream set by
`setpwent'.
-- Scheme Procedure: endpwent
Closes the stream used by `getpwent'. The return value is
unspecified.
-- Scheme Procedure: setpw [arg]
-- C Function: scm_setpwent (arg)
If called with a true argument, initialize or reset the password
data stream. Otherwise, close the stream. The `setpwent' and
`endpwent' procedures are implemented on top of this.
-- Scheme Procedure: getpw [user]
-- C Function: scm_getpwuid (user)
Look up an entry in the user database. OBJ can be an integer, a
string, or omitted, giving the behaviour of getpwuid, getpwnam or
getpwent respectively.
The following functions accept an object representing group
information and return a selected component:
`group:name'
The group name.
`group:passwd'
The encrypted group password.
`group:gid'
The group id number.
`group:mem'
A list of userids which have this group as a supplementary group.
-- Scheme Procedure: getgrgid gid
Look up an integer group id in the group database.
-- Scheme Procedure: getgrnam name
Look up a group name in the group database.
-- Scheme Procedure: setgrent
Initializes a stream used by `getgrent' to read from the group
database. The next use of `getgrent' will return the first entry.
The return value is unspecified.
-- Scheme Procedure: getgrent
Return the next entry in the group database, using the stream set
by `setgrent'.
-- Scheme Procedure: endgrent
Closes the stream used by `getgrent'. The return value is
unspecified.
-- Scheme Procedure: setgr [arg]
-- C Function: scm_setgrent (arg)
If called with a true argument, initialize or reset the group data
stream. Otherwise, close the stream. The `setgrent' and
`endgrent' procedures are implemented on top of this.
-- Scheme Procedure: getgr [name]
-- C Function: scm_getgrgid (name)
Look up an entry in the group database. OBJ can be an integer, a
string, or omitted, giving the behaviour of getgrgid, getgrnam or
getgrent respectively.
In addition to the accessor procedures for the user database, the
following shortcut procedures are also available.
-- Scheme Procedure: cuserid
-- C Function: scm_cuserid ()
Return a string containing a user name associated with the
effective user id of the process. Return `#f' if this information
cannot be obtained.
-- Scheme Procedure: getlogin
-- C Function: scm_getlogin ()
Return a string containing the name of the user logged in on the
controlling terminal of the process, or `#f' if this information
cannot be obtained.
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